WO2006045352A1

WO2006045352A1 - Method for allocating a characteristic for allowing a terminating automatic return call

Info

Publication number: WO2006045352A1
Application number: PCT/EP2005/005330
Authority: WO
Inventors: Peter Goldstein
Original assignee: Siemens Schweiz Ag
Priority date: 2004-10-26
Filing date: 2005-05-17
Publication date: 2006-05-04
Also published as: EP1808005A1; EP1653718A1; US20080089505A1

Abstract

The additional service of the automatic return call "CCBS", "CCNR" can only be administrated for the A-subscriber (A-Tin) according to the recommendations and standards of ITU-T and ETSI. In particular, possible allocation of the characteristic for allowing an automatic return call only, for each distribution point (Vst), is disadvantageous, in particular for B-subscribers (Tin) which can be addressed via an IN-service. The invention also relates to a method for the allocation of an individual characteristic for a B-subscriber in order to allow an automatic return call "CCBS", "CCNR" which can be individually administrated by or for the B-subscriber. An individually and, optionally, automatically administrating, by the subscriber, indicator (cc term) is provided in the memory (Tin-Sp) for each B-subscriber. An image of said indicator (CC Ind) is signalled back to the distribution point (Vst/SSP) of the A-subscriber when a connection is established.

Description

Method for assigning a license to terminate an automatic callback

The present invention relates to a method for assigning a license plate for the authorization of a terminating automatic callback according to the preamble of patent claim 1.

In the following, instead of a German non-technical language, the English-language nomenclature and acronyms from the standards of ITU-T and ETSI will be used, e.g.

- «IN» «Intelligent Network»,

- «SCP» «Service Control Point»,

- "CCBS / CCNR" automatic callback on busy / no answer, etc. Uncertainties can be avoided by using standardized terms and acronyms. A list of the acronyms, abbreviations and terms used at the end of this document forms an integral part of this document.

The present invention relates to the field of end to end supplementary services, such as the automatic call completion call completion. The service automatic call-back "call completion" for the connections from a (calling) subscriber A to a (called) subscriber B is specified in the following forms CCBS and CCNR in [1] or [2]:

- Automatic callback on busy (CCBS);

- Automatic callback on no reply (CCNR).

According to [1], on the side of the A-participants it is stipulated that the service CCBS A can be assigned to a participant on an individual basis, see in [1] "3.1 provision / withdrawal", paragraph 1.

On the side of the B-subscribers in general and in particular for those connected to an automatic Teilnehmer¬ switching system - also called extension - connected If no individual assignment is standardized according to ITU-T or ETSI, the automatic callback service may be activated for these B-subscribers. The reason is that the need for differentiation at subscriber level was not recognized. Therefore, the information as to whether the activation of an automatic callback is allowed is derived per exchange from the existing or non-existent functionality in the exchange.

This provision-specific determination without taking into account the nature of the subscriber proves to be inadequate. This also applies to connections which contain a number conversion, as is the case with IN connections, and where the SCP (valid from IN Capability Set 2) decides on the basis of the relevant IN service, without taking into account the nature of the IN service Participant, whether the indicator "call completion" set by the exchange of the B-subscriber should be overwritten with the content "possible", possibly with the content "not possible". This indicator or its image is contained in the message "RELEASE" for the connection termination originating exchange of the B-subscriber. For example, for IN connections with the number sequence 0900 ... the indicator «call completion» CCI is set from «possible» to «not possible». This can also be prevented by an automatic callback, the IN-specific charge can be bypassed. In the case of certain IN services, such as e.g. However, "corporate access" (virtual, geographically independent direct dialing area for companies) does not suffice for this modification of the indicator on the basis of the IN service alone, since a distinction should be made here between the telephone number of the central office and the telephone numbers of the individual employees of a company. Coporate Access »Distributed sites use Corporate Access to be reachable at one phone number (regardless of location), with geographical access

(nearest company location) and temporal (company location, which at the time the central office staff, eg regional holidays, criteria are taken into account.

The determination of the authorization of the automatic callback, which takes place per switching center, is also insufficient because the network operator receives fault messages because of the limited availability of this additional service, which is not based on a fault but on a limited functionality.

It is described in EN 301 140 [3] that the SCP can, on the basis of the IN service, but not on a subscriber-specific basis, design the SSP to possibly modify the indicator "call completion" in the "RELEASE" message.

The present invention is therefore based on the object of specifying a method for assigning a license-terminating license plate which can be specifically administered by or for the B-subscriber. In particular, this method should also make it possible to provide the appropriate information in the indicator "call completion" for B users who can only be addressed via an IN service.

This object is achieved according to the invention by the method specified in patent claim 1.

According to the method steps according to the invention, a method is provided which requires no adaptations in the telecommunication network concerned and thus on the other exchanges except those of the B subscriber and thus remains in conformity with the existing recommendations and standards of ITU-T and ETSI. The term "terminating automatic callback" is used because, according to the present invention, the authorization for the automatic callback service is divided into a component authorization for activation and a component The user is allowed to accept automatic return calls, the latter not referring to the exchange assigned to the B subscriber, but to the respective B subscriber.

In order to reproduce the exact facts here in other words: according to the method according to the invention, it is the assignment of the permission to be called by an automatic callback and not the permission to activate an automatic callback. The invention provides for enabling a B-subscriber-individual assignment of the permission of an automatic call-back, that in the exchange, this assignment is based on the provision of an individual subscriber per B-subscriber. In an implementation of the present invention, this can be implemented, for example, by means of a single bit per B-subscriber. This bit contains the information:

«CCBS / CCNR possible» Automatic callback allowed, coding 1; or - «CCBS / CCNR not possible»

Automatic callback not allowed, coding 0.

Advantageous embodiments of the invention are specified in further claims.

Embodiments of the invention are explained below with reference to the drawings. 1 shows the configuration for the IN service "Corporate Access" at Centrex; Figure 2 Configuration for the IN service "Corporate Access" when using extensions;

Figure 3 message flow for setting up the CC indicator CCI. The following exemplary embodiments disclose preferred embodiments with a B subscriber-specific assignment of the authorization of an automatic callback.

In a first configuration according to FIG. 1, the invention is explained for a group of B subscribers B-TIn which are connected to a telecommunications network by the Centrex service. This is based on the assumption that these Centrex-B subscribers B-subscriber are connected to different exchanges VSt. The various switching centers VSt are geographically located at different locations. This is in the figure 1 with place I and place II bezeich¬ net. This embodiment is based on a closed numbering plan. However, the type of numbering plan, such as the numbering plan itself, is of no significance for the execution of the invention. An enterprise has a plurality of B subscribers identified in the figure with geographic numbers. In a location Place I, the addressing takes place via the geographic call number 071 495 nn nn, which is not visible to any A subscriber outside the centro group of this company. At another location, location II, the participants of the same company are marked with geographical numbers 022 338 mm mm. According to the centrex functionality implemented in several exchanges Vst, the subscribers can be addressed with each other with eg four digit internal numbering. External calls are made via the IN service "Corporate Access", in this example 058 585 nn nn. In the service control node SCP, due to the dialed number, a conversion of the dialed number takes place. This conversion can be configured, for example, depending on the telephone number of the A subscriber and / or the time of day. For this purpose, a data structure in the form of a table which contains the aforementioned conditions is usually used in the SCP. For further explanation, reference is now made to FIG. 3. In the exemplary embodiment according to the configuration of FIG. 1 for the Centrex case, an indicator "cc term" is provided per subscriber, which contains the information as to whether this subscriber may be called with the CCBS / CCNR service.- FIG. 3 does not show the entire message sequence but only those elements which are required for the presently explained method. It is assumed that the called B subscriber is busy or does not answer. This is signaled back in a message "RELEASE". According to the state of the art or in accordance with ITU-T / ETSI standards for the protocols for establishing a connection, it is already provided in this message whether the service CCBS / CCNR is possible or permitted for the B subscribers of the exchange concerned. An image of the aforementioned B-subscriber-specific indicator cc term is now stored by the exchange VSt in this message. Since this call is based on the IN service "Corporate Access", the service number of the service execution node SSP used to be 058 585 nn nn for the geographical number

022 338 nn nn been inserted. The message from Dienstkon¬ troll node SCP includes not only this phone number, son¬ further information to treat the call in question, so if necessary (depending on the IN Capability Set) and the information, such as the indicator CC Ind in the message to the exchange of the A-subscriber A-TIn is to be modified. This further information is stored in a connection data memory Verb-Sp. In this connection data memory Verb-Sp, the information relating to the modification of the indicator CC Ind has the characteristics

- "CC no modification"; no modification or

- "CC not possible".

In this way, it is now possible to signal the authorization of an automatic callback B-subscriber-individually to the A-subscriber while retaining the option of intervention, depending on the IN-service; through the SCP. These B-parts individual user authorization may be established by a Centrex administrator; However, it is also possible that the person assigned to the B-subscriber can release the permission with a special character string to be entered via the telephone keypad, eg * 38 #, and block this permission with # 38 #.

The embodiment according to FIG. 2 relates to a company whose subscribers B-TIn are connected to different subscriber exchanges PBX. As a rule, these subscriber systems PBX will also be located at different geographical locations. However, this is not mandatory, as in larger companies or companies with a vital function in the same place for redundancy reasons several PBXs PBX are provided, which are also connected to different exchanges VSt. Although this is not essential for the present invention, the invention is also implementable for this particular connection of the B-Subscriber B-TIn tel quel, usually per location site I or II place a so-called center is provided in which those An¬ calls go where the A-subscriber A-TIn (meaning: the person behind the A-subscriber A-TIn) does not know the extension number of the calling B-subscriber B-TIn. This center usually has an easily remembered phone number, the phone number terminated with «11 11» or «00 00». Per subscriber B-TIn on the PBX PBX is also defined whether the permission for an external automatic callback for the relevant B-subscriber B-TIn is given or not. As a rule, this permission is not given for the aforementioned headquarters. This permission is now also in a message for the connection of the exchange VSt at which the Teilnehmervermittlungs¬ system PBX is connected, transmitted to the exchange VSt or to the service execution node SSP and there as already to Figure 3 executed in the connection data store Verb-Sp and modified if necessary. It should be noted that in this embodiment in the exchange VSt, to which a Teilnehmervermittlungsanläge is connected, with the exception of the number range no mediating data are stored. The number range is based on the «DDI» procedure.

According to the configurations in FIGS. 1 and 2, the service CCBS / CCNR can be activated by the A-subscriber if the image of the indicator is set to "CCBS possible" in "his" exchange in the connection memory Verb-Sp.

In a further development of the present invention it can be provided that this image of the indicator cc term is signaled back to the A-subscriber himself. In this way, in the case of a telephone apparatus with display, the person concerned already sees, before activation of the service CCBS / CCNR, whether this service CCBS / CCNR is possible for the relevant call.

It would also be conceivable to use the invention for a non-standardized supplementary service CC, as disclosed, for example, in WO 03/036928 A1 [5].

List of reference numbers used

A-Tln A-subscriber, calling subscriber, A-subscriber B-TIn B-subscriber, calling subscriber, B-subscriber

CC Ind An image of the indicator cc term in a signaling message for the connection establishment / deceleration cc term indicator, containing license return authorization mark

Location I is the first location or first location of the exchange VST associated with the subscriber switching center PBX and / or the Centrex subscriber

Location II second location or second location of the Teilnehmer¬ PBX assigned exchange VSt and / or the Centrex participants

Tln-Sp subscriber data storage VSt exchange

List of abbreviations and acronyms used

CC "Automatic callback", call completion

CCI information element containing automatic callback possible / not possible; call completion indicator

CCBS «Automatic callback on busy», call completion busy subscriber CCNR «Automatic callback if no reply», Call completion no reply

DDI Direct dialing in, extension

IN Intelligent Network

ISDN Integrated Services Digital Network ITU International Telecommunication Union

ITU-T Telecommunication Standardization Sector of ITU

PBX local loop, extension, private sector exchange PSTN Public Switched Telecommunication Network

SCP Service Control Node, Signaling Control Point

SSP Service Execution Node, Signaling Switching Point

POTS Plane Old Telephone System

bibliography

[ITU-T 1.253.3 (07-1996)]

Completion of calls to busy subscribers [2] ITU-T 1.253.4 (07-1996)

Completion of calls on no reply [3] EN 301 140 Vl.3.4 (1999-06) Intelligent Network (IN);

Intelligent Network Application Protocol (INAP) Capability Set 2 (CS2) Part 1: Protocol specification ETSI, 1999

[4] ITU-T P.16 (02-1995)

Global Virtual Network Service [5] WO 03/036928 Al

«Callback at non-busy via automated redial in telecommunication networks» Applicant: T-Mobil Deutschland GmbH.

Claims

claims

A method for assigning a terminating automatic recall (CCBS, CCNR) identifier from an A-subscriber (A-Tln) to a B-subscriber (B-Tln) each connected to an exchange (VSt), wherein the B subscriber is dialed via an IN service with number conversion and the IN service is provided by means of a service execution node (SSP) and a service control node (SCP), in the exchange (VSt) for the B subscribers an indicator ( CC Ind), which contains the information as to whether an automatic callback (CCBS, CCNR) is permitted for the B subscribers; characterized in that

A the indicator (CC term) B-subscriber is provided individually,

B the image of the indicator (CC Ind) is the switching center (VSt) of the A-subscriber in a message for the connection establishment / dismantling transmitted.

C depending on an information transmitted by the service control node (SCP), the authorization contained in the indicator (CC term) for an automatic callback (CCBS, CCNR) is modified in the image (CC Ind) in the service execution node (SSP).

2. The method of claim 1; characterized in that the B-subscribers are connected to a Centrex group.

3. The method of claim 1; characterized in that the B-subscribers (B-subscriber) are connected to a subscriber exchange (PBX).

4. The method according to any one of claims 1 to 3, characterized in that the automatic callback in the expression "callback on busy" (CCBS) is implemented.

5. The method according to any one of claims 1 to 3, characterized in that the automatic callback in the expression "Callback on Not Report" (CCNR) is implemented.